Remote control valve for heavy duty sandblast hose



H. A. GREISER Jne 9, 1953 REMOTE CONTROL VALVE FOR HEAVY DUTY SAND BLAST HOSE Filed March 26, 1951 Wg). Y .f l 7'@ IIIIIIIIIIIIII//IIIIII/ Patented June 9, 1953 UNITED STATE-s rTENT OFFICE REMOTE CONTROL VALVE FDR' HEAVY 'DUTY SANDBLAST' H0 SE 9f Claims. i

This invention relates tov valves and `more particularly to improvements in valves fory sand tion with the discharge end of a flexible 'hose through which sand and compressed air are con- -veyed from a conventional compressor and sand generator. lin this connectionthe device `of the present invention issimilar to the remote con-- trol valve described, disclosed-and claimed in my oopending application Serial No. 199,099 `iiled on December v4, 1950 the United States Patent Office. Howevenin easesof thefsandblast clean-- ingof `castings and `buildings or in cases of the ornamentation of exceptionally .large areas of granite, `marble and. stone `monuments and the like, heavier sandblast hose vlines are required. Itis with such heavy duty sandblast hose that thev valve ofthe present. invention. isbest suited.

It is `one object of the presenty invention to providea hand controlled cut-oil valvev for heavy duty, highpressure air lines.

Another object is to provide a leverfactuated cut-oi valve for vheavy duty sandblasting hoses as close to the ,nozzle end thereof aspossible for controlling the-.flow of air-sand mixture through such hoses at a point remote from the compressor and generator.

yOther objects `and advantages of the I4present 4invention Will become apparent in the following p of the valve shown in Figs. l to 4 inclusive.

Fig. 6 is a longitudinal. section similar to that of Fig. 2 with parts thereof shown in a different position and the nozzle removed.

Fig. 7 is an end vievv of the valve as seen in Fig. 6.

Fig. 8 is an enlarged fragmentary detail section ofa portion of Fig. 6 with certain parts thereof more fully disclosed.

Referring now to the drawings, the valve of the present invention, generally designated ID,

y comprises a tubular body Il forming a housing for a section of latex hose l2. The-section of latex hose is very pliable and fitssnugly against 1 21 the inner passage i3 ofthe body H which proteots the hose l2 and prevents -it from expandingunder normal internal operating pressure as later become apparent.

One end lil of the tubular bod-y H has a flange formation l providing a shoulder It adjacent a relatively reduced nipple- -l l' provid-ed with outside threading i8. .en-adapter sleeve it having one ilanged end 2t provided with internal threading 2i is adapted to t the thread-ing t8 on thenipple il. The sleeve I9 hasan internal soit metal insert 22 prepu'nohed as at 23 to provide tongues 24 adapted to be bent inwardly to clampingly engage the discharge end 25 of a sand-blast hose 2S. The hose 26 is generally of .considerable Ilength having its opposite -endconnected to a source of air and sand, not shown. lt should here be noted that the internal diameter of the hose 2t can be of various dimensions and associated with a sleeve such as lthe Yone i9' to suit its diameter, such -sleeve having an end ange 2t threaded to nt the nipple `Il -to thereby hold such hose in sealed and axial abutment With the latex hose it.

'The opposite end 2 of the tubular body ll-I has an enlarged flange 2li 'Which is threaded `internally as at 29 to receive the threaded nipple 30' oianozzle 3l.

le/iidwaybetween its ends the tubular body `I-l is provided with an opening which is lsubstantially of circular configuration when looking radially into'thel tubular body l I `from below (see Fig. V5).

Inthis connection it Will be noted -that the body Il is provided with ybearing bosses 36 in a plane X coincident to the radial lineon which the opening 35 -is centered. AThe rearward portion of the bosses 3i-consists enf-spaced depending flanges Wm-.iii bored transversely the plane X to provide trnnnionlikemountings for a hand .in Fig. 8, the pivot portion d3 of the lever-40 comprises spaced bosses M between which acoil yspringnd is disposed on the shaft 42. One end of spring l5 bears against a recessed portionof the body li and the opposite end of the spring .bears against the lever Il@ Ato maintain the latter in released or normal position against the periphery of the adapter sleeve I9, i. e., in substantialparallelism with the axis of the tubular 'Thestopper arm 4l is mounted for free float- It will be noted in Fig. 8 that the padlike por- I tion 48 of the arm 4| is centered on an arc a scribed from the axis of the pintle 46 and that the arm 4| is provided with a cam lug 49 segmentally spaced along arc a from the pad 4B for engagement with a cam surface 50 provided on the fore end 41 of the hand operated lever 40. Consequently, it will be noted that when lever 40 is in its normal position its cam surface 50 acts as a stop for limiting further movement of the pad 48 out of alignment with the periphery of the body II in the region of the opening 35 therein. In this manner the hose I2 is normally supported in the region of the opening 35 to prevent bulging of the latex hose through the opening 35 when the internal pressure of the hose is increased. In other words, the pad 48 serves as a door or closure for the opening 35.

rlhe arm 4| is provided with a recess 5I 1n its segmental periphery and a pair of spaced bearings 52 extend outwardly therefrom to receive the ends of a pin 53 having a latch means thereon in the form of a U-shaped pawl 54. A coil spring 55 is mounted on the pin 53 between the legs of the U-shaped pawl and one end of this spring 55 bears against the recess periphery 1,

of the arm 4I and the opposite end of spring 55 bears against the bight portion of the pawl 54 to urge the free end 66 of the pawl away from the periphery oi the arm 4|. However, the opposite end of the pawl 54 engages a portion of 4| to limit the extent the periphery of the arm pawl 54 can be to which the free end 56 of the moved beyond the arm 4|.

rihe forward portion of the bosses 36 consists of a centrally located bearing 59 within which a keeper bolt 66 is mounted for turning movement about an axis transverse to the plane X. 'Ihe axis of the bearing 59 is disposed substantially tangent to the circular opening 35 and is open as at 6| on its rearward side so as to expose a substantial portion of the periphery of lthe keeper bolt 6i) for engagement by the extended pawl 54 when the arm 4| is swung toward the body Il. The keeper bolt 66 has a radially disposed shoulder 62 formed thereon and l a portion of the main body or the bolt 66 is recessed on a gradually reduced radius so that the periphery of the bolt 66 is somewhat spiral in shape cross sectionally (see Fig. 8).

The keeper bolt has a square head 63 at one end to receive a trigger lever 64 which is `secured to the bolt 60 by a screw 65. A coil spring 66 encircles a reduced portion of the bolt 60 adjacent the trigger lever 64. One end of this spring 66 is hooked onto the lever 64 and the opposite end of this spring 66 lies against a flange 61 formed on a guard 68 which fits over the fore end 41 of lever 4U, the stopper arm 4| and their associated operating mechanisms. The trigger lever 64 is thereby urged into a normal position against a stop wing 69 formed on the body Il as best seen in Fig. l. The cover 68 protects the bearings and actuating surfaces of the lever 40, arm 4|, pawl 54 and keeper' bolt 4 60. As best seen in Figs. 1, 3, 4 and 5 the guard 68 is secured to the body II by a suitable machine screw 68 which extends into the forward portion of the bosses 36 on body When the trigger lever 64 is in its normal position, as above explained, the shoulder 62 formed on the keeper bolt 66 is substantially in alignment with the upper and rearward face 6| of the bearing 59. Consequently, when the lever 40 is swung away from the body |I against the action of spring 45 so that the cam surface 50 of lever 40 forces the stopper arm 4| toward the body II, the pawl 54 on arm 4| passes the recessed periphery of the keeper bolt 66 and the free end 5B of pawl 54 engages the crevice c of the bolt 60 adjacent the shoulder 62 thereof (see Fig. 6). The padlike portion 48 of the stopper arm 4| is thus swung into the passage I3 of the tubular body |I distorting the latex hose I2 to thereby pinch the same as at 10.

Although the pressure of the air and sand mixture within the sandblast hose 26 builds up behind the pinched portion 10 of the latex hose I2, the pad 48 is maintained in hose pinching position by reason of the abutment of pawl 54 against the keeper bolt 66. In this manner discharge of sand and air from the nozzle 3| is prevented. Meantime, the operating lever 46 is free to return to its normal position by action of its return spring 45.

When it is desired to open up the valve to allow discharge of sand-air mixture from the nozzle, the trigger lever 64 need only be depressed by the thumb of the hand in which the valve I6 is held. In other Words, depression of trigger lever 64 rotates the keeper bolt counterclockwise as seen in Fig. 8 so that the shoulder 62 of the bolt 60 forces the pawl 54 against action of its spring 55 into the recess 5l on the periphery of the stopper arm 4|. It should here be noted that the bight portion of pawl 54 is arcuate and therefore, once the free end 56 of the pawl is dislodged from the crevice c the pawl will be further cammed into recess 5I as the pressure of air-sand mixture within the latex hose I2 forces the pad 48 and arm 4| toward their initial or normal position.

When the cam lug 49 of stopper arm 4| strikes the cam surface 50 on lever 46 further movement of the arm 4| is repelled and the padlike portion 418 of the arm 4| is again aligned with the tubular body Il to plug up the opening 35 therein and thereby support the latex hose |2 in the region 0f the opening 35.

When the trigger lever 64 is released, its spring 66 causes it to return to normal position against the wing 69 formed integrally on the body Il. Since the lever 64 is keyed to the keeper bolt 60 the latter is also returned to its reset position in which its shoulder 62 is in substantial alignment with the rearward face 6| of the cutaway bearing boss 59. In this position the keeper bolt is again ready to latchingly receive the free end of the pawl 54 in the manner as hereinbefore explained.

While I have specifically described what I believe to be the best mode of carrying out the principle of my invention it will be apparent to those skilled in the art that various modifications and alterations thereof can be made without departing from the spirit of my invention.

I therefore desire to avail myself of all modifications, alterations and variations as fairly come within the purview of the appended claims.

lli/"hat Lclaim `.as new and desireto protect:y by Letters Patentgis:

l. In a valvevof the .type having a tubular body communicating at,y one endwixth-:an airblast line and having anozzle; atiitsxother kend and a latex lining Within saidirtubular:bodyrbetween said airblast line .and nozzle. the combination therewith of .means iforrcollapsing said latex liningforl stopping flowA 'ofsairiunder ,pressure vthere'- through,r comprising a lever: actuated arm, said body having .a circular opening formed Atherein adjacent said arm, a padlike 4closure on said arm. .congurated to conform= to .thatrportion i of said tubular body,removeditotprovide the openingl therein', means .for normally `holding Asaid closure in register with the opening in saidfzbody, a 'lever Vfor actuating `said arm `to force` said closure into saidtubular `bodyfor collapsingrthe latex lining therein,` alatch' means on said arm, and a `releasable keeper-'bolt mounted on said body and engageable by said latch when said closure is within said tubular body Afor maintaining said closure in pinching `relation against said latex lining.

2. In a valve ofthe type: having a tubular body communicating at one: end Lwith an airblast line and having a nozzle'at its other end .and a latex lining Within said tubular body, the combination therewithof imeans' for collapsingsaid latex lining for stopping flow of air under presi sure therethrough, comprising a lever actuated arm, said body having a circular opening formed therein adjacentsaid arm, a padlike closure on saidy arm coniigurated. to conform to the shape of. said tubular body, means for n'orrnallyholding said closure in register withxthe-opening in said body, a lever for `actuating said arm to force said closure into said tubular body for collapsing the latex lining therein, latch means on said arm, a releasable keeperv bolt mounted on said body and engageableby said latch means when said closureis Within. said tubular body for maintaining said closure rin .pinching relation against said l'atexlining, and manually operated means connected to said releasable keeper bolt for releasing said latch means from. engagement with said keeper bolt.

3. In combination ywith a sand blastunozzle of the type including a tubular housing having a collapsible hose confined .within it of means for pinching said collapsible `hose for stopping the fiow of fluid' under pressure therethrough, comprising a hand controlled leverpivotally mounted on said housing and having a cam surface on its fore end, saidhousing having a circular opening formed thereinbetween'its ends on an axis disposed radially ofthe Acircular cross section of said housing and in the plane of swing of'said lever, an arm pivotally mounted between the fore end of said lever and said opening, a cam lug on said arm engageable with the cam surface on the fore end .of said. lever, a padlike closure on said arm in an arcuate plane substantially coincident-to `the arc of swing of said cam lug, said closure being Iof a circular configuration to t the opening in said housing and of arcuate configuration cross sectionally to'conform to the shape of said tubular housing and normally disposed in alignment therewith to support said collapsible hose in the region of said opening, a keeper `bolt mounted on said housing for turning movement about an axis transverse of the plane of swing of said lever and said arm, a spring urged pawl pivotally mounted on the periphery of said arm between said cam lug: and. said .closurey and, ,eng-agea'ble: with. said keeperboltywhen said arm is: urged toward said housing upon manipulation of said lever to thereby hold said closure-inrpinching relation against said collapsible hose, and a spring actuated trigger connected to said keeper bolt for turning the jlatter to thereby release `the spring urged pawl therefrom.

e. .In arvalveof theptubular body type having. a collapsible latex liningv communicating with the discharge end `of fluid pressure supply line and adapted to be, 'pinched for stopping the flow of duid ,under pressure therethrough, the combination with said tubular body ofY a spring urged operating lever pivotally mounted on said body for movement ina plane including the axis of said tubular body and normally disposed in substantial .parallelism therewith, said tubular. body having a` circular opening formed therein on an axis disposed radially of said body and inthe plane l.of movement of said lever, an arm pivotally mounted on said body between the openingxtherein and said lever and having a padlike closure formed thereon in the region of said opening,` said closure conforming substantially to the contour of said body in the region of said opening, said arm having a cam lug engageable by the iore end of said lever whereby to hold said closure in the opening in said body for supporting, said collapsible lining, therein in the region of said` opening, ya spring urged pawl pivotally mounted on: theperiphery of said arm, and a keeper bolt movably mounted on said body for engagement by said pawl, said keeper bolt having a recess formed therein for receiving the free end of said pawl when said arm is urged toward said body by manipulation of said lever and said closure on said arm is in `pinching rela.- tion with said collapsible latex lining.

5. Ina valve'of the tubular body type having, a collapsible latex lining communicating with the discharge end of fluid pressure supply line and adapted to be pinched for stopping the flow of iiuid underzpressure therethrough, the combination withv said tubular body of a spring urged operatingv lever `pivotally mounted on said body for movement `in a plane including the axis of saidv tubular body Aand normally disposed in substantial parallelism therewith,4 said tubular body having a circular opening formed therein on an axis disposed radially of said body and in the plane of movement of said leveran arm pivotally mountedonsaid body betweenthe opening therein and said lever and having a padlike closure formed thereon in the region of said opening, said closure conforming substantially to the contour of said body `in thel region of said opening, said arm having a cam lug, engageable by the fore end of said lever whereby to hold said closure in the opening in said body for supporting said. collapsible: lining, therein. in the. region of said opening, a spring urged pawl pivotally mounted onthe periphery of said arm, a keeper boltmovably mounted on said body for engagement by said pawl, .said keeper bolt hav-ing a re.- Ycess/formed therein for receiving the free end of said pawl when said` arm is urged towardlsai'cl body by manipulationy of said lever and said closure on said arm is in pinching relation with said collapsible latex lining, and a thumb. actuated trigger operatively connected to said keeper Abolt for moving the recess vformed lin the/latter into a position to unseat the free end of said pawl therefrom whereby said arm is free to return to its normal position under the influence of the internal pressure within said latex lining.

6. In a sandblast nozzle having a body provided with a tubular passage in which is confined a latex liner in axial alignment with the discharge end of a sandblast line, the combination therewith of means for controlling the flow of compressed air and sand through said latex liner comprising a lever actuated arm pivotally mounted on said body for swinging movement in a plane including the axis of the tubular passage in said body, said body having an opening in its periphery exposing a portion of said latex liner adjacent said arm, a pad on said arm adapted to register with said opening in said body, a lever pivotally` mounted on said body for swinging movement in said plane and having a cam surface engageable by said arm under the inuence of the liner expanding force of the compressed air and sand passing through said liner, and stop means on said body for engaging the free end of said lever for limiting movement thereof in one direction beyond a point wherein said pad is in register with said opening formed in said body to thereby maintain said expanded latex liner within the connes of the passage formed in said body.

7. In a sandblast nozzle having a body provided with a tubular passage in which is confined a latex liner in axial alignment with the discharge end of a sandblast line, the combina- 5 tion therewith of means for controlling the flow of compressed air and sand through said latex liner comprising a lever actuated arm pivotally mounted on said body for swinging movement in a plane including the axis of the tubular passage in said body, said body having an opening in its periphery exposing a portion oi said latex liner adjacent said arm, a pad on said arm adapted to register with said opening in said body, a lever pivotally mounted on said body for swinging movement in said plane and having a cam surface engageable by said arm under the influence of the liner expanding force of the compressed air and sand passing through said liner, and stop means on said body for engaging vthe free end of said lever for limiting movement thereof in one direction beyond a point wherein said pad is in register with said opening formed in said body to thereby maintain said expanded latex liner within the connes of the passage formed in said body, said cam surface being disposed to bear against said arm upon manipulation of said lever in an opposite direction for urging said pad into said passage and against said latex liner for restricting or collapsing the same.

8. In a valve of the type employed in the art of Sandblasting including a 'latex liner coniined within a tubular bodyA in axial alignment with a nozzle and the discharge end of a Sandblasting hose; the combination therewith of means for controlling the flow of sandblast material lthrough said latex liner comprising a pair of trunnonlike projections on said body, said body having a circular opening formed therethrough adjacent said projections and in a plane coincident to a line between them, an arm pivotally mounted on said trunnion projections for swinging movement toward and from said opening, a

padlike closure on said arm having a circular form adapted to register with said opening and having an arcuate cross section conforming to the arcuate configuration of said tubular body for blocking the opening formed therein and thereby support said latex liner therein against the inuence of the pressure of Sandblasting material passing therethrough, a manually operable lever pivotally mounted on said trunnionlike projections rearwardly of said arm and having a cam surface adapted to engage said arm for transmitting motion thereto, and stop means on said body engageable by the free end of said lever for limiting movement thereof in one direction under the influence of the pressure of the Sandblasting material upon said padlike closure and arm for normally maintaining said padlike closure in register with the opening formed in said body.

9. In a valve of the type employed in the art of Sandblasting including a latex `liner confined within a tubular body in axial alignment with a nozzle and the discharge end of a Sandblasting hose; the combination therewith of means for controlling the now of sandblast material through said latex `liner comprising a pair of trunnionlike projections on said body, said body having a circular opening formed therethrough adjacent said projections and in a plane coincident to a line between them, an arm pivotally mounted on said trunnion projections for swinging movement toward and from said opening, a padlike closure on said arm having a circular form adapted to register with said opening and having an arcuate cross section conforming to the arcuate conguration of said tubular body for blocking the opening formed therein and thereby support said latex liner therein against the iniiuence of the pressure of Sandblasting material passing therethrough, a manually operable llever pivotally mounted on said trunnionlike pro-M" jections rearwardly of said arm and having a cam surface adapted to engage said arm for transmitting motion thereto, stop means on said body engageable by the free end of said lever for limiting movement thereof in one direction under the influence of the pressure of the Sandblasting material upon said padlike closure and arm for normally maintaining said padlike closure in register with the opening formed in said body, and a releasable keeper bolt mounted on said body in the region thereof in advance of said opening and in the path of swing of said arm toward and from said opening, and a Oneway latch carried by said arm and engageable with said keeper bolt for latching said arm in a position toward said opening for maintaining said padlike closure in pinching relation relative to said latex liner for collapsing the same to obstruct the flow of sandblast material therethrough.

HOWARD A. GREISER.

References Cited in the file of this patent UNITED STATES PATENTS Great Britain A. D. 1927 

